A group of researchers from the Bulgarian Academy of Sciences (BAS; Sofia, Bulgaria) has devised a system for optimising bioethanol production from starch using a single reactor in which starch is converted to sugars and then to ethanol. The use of a single reactor for the two-step process can significantly cut costs, the researchers say. The single reactor approach devised by BAS involves a software system connected to sensors within the reactor to optimize the control of the starch feed rate and the concentrations in the reactor of starch and glucose...